Poly(butylene glutarate) as a processing aid for hot-melt extrusion of poly(hydroxybutyrate-co-hydroxyhexanoate)

Poly(butylene glutarate) (PBG) was evaluated as a processing aid for hot-melt extrusion of poly(hydroxybutyrate- co -hydroxyhexanoate) (PHBHHx). The presence of PBG reduced the melt viscosity and storage and loss moduli of PHBHHx, and the magnitude of these effects increased with higher PBG loadings...

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Bibliographic Details
Published in:MRS communications 2023-10, Vol.13 (5), p.854-861
Main Authors: Holt, Apisata, Bledsoe, Joshua, Crane, Grant, Locklin, Jason
Format: Article
Language:English
Subjects:
Biomaterials
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Engineering
Materials Science
MRS 50th Anniversary Research Letter
Nanotechnology
Polymer Sciences
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Summary:Poly(butylene glutarate) (PBG) was evaluated as a processing aid for hot-melt extrusion of poly(hydroxybutyrate- co -hydroxyhexanoate) (PHBHHx). The presence of PBG reduced the melt viscosity and storage and loss moduli of PHBHHx, and the magnitude of these effects increased with higher PBG loadings. The optimal content of PBG in PHA was observed to be 10 wt%, and was shown to accumulate at the wall/die surfaces of the extruder, acting as a slip agent. The enhancement in processability given by PBG was evidenced through elimination of melt fracture and preservation of molecular weight. Graphical abstract
ISSN:2159-6867
2159-6867
DOI:10.1557/s43579-023-00394-7